COW AutoGen3 Tundra 3.4L
Service checklist & specs companion for the magnet QR. Universal Gen3 2022–2026 · 2WD & 4WD · gas 3.4L.
Verify before you wrench. Numbers below are a quick-ref for the Maintenance Magnet. Confirm every torque, capacity, interval, and part against your owner’s manual and VIN before service. The magnet is not a substitute for the FSM or dealer guidance. Many rows are still marked Unverified pending an owner’s-manual check.
Torque
Wheels, oil change, diffs / transfer case, and transmission. Gen3 uses one spin-on oil filter for both 2WD and 4WD.
Wheels
| Spec | Value | Source |
|---|---|---|
| Lug nuts — OEM aluminum | 97 ft-lb | S5 WhatSizeBolt Unverified — confirm OM |
| Lug nuts — OEM steel | 154 ft-lb | S5 WhatSizeBolt Unverified — confirm OM |
| Lug socket / thread | 22 mm · M14×1.5 | S9 TorqueSpec Unverified — confirm OM |
Oil change
| Spec | Value | Source |
|---|---|---|
| Oil drain plug | 30 ft-lb · 14 mm | S4 EngineOilDB (torque); socket per magnet / field confirm Unverified — confirm OM |
| Oil filter (spin-on, 2WD & 4WD) | 13 ft-lb | Magnet / field; Gen3 OEM 90915-YZZN3 spin-on both drives (not Gen2 cartridge) Unverified — confirm OM |
| Skid plate | 21 ft-lb · 12 mm bolts / 10 mm clips | S1 Owner’s manual / field confirm Unverified — confirm OM |
Diffs / transfer case
| Spec | Value | Source |
|---|---|---|
| Front diff fill/drain | 29 ft-lb · 10 mm hex | S1 Owner’s manual Unverified — confirm OM |
| Rear diff fill/drain | 36 ft-lb · 24 mm | S1 Owner’s manual Unverified — confirm OM |
| Transfer case | 18 ft-lb · 3/8″ square | S1 Owner’s manual Unverified — confirm OM |
Transmission (10-spd)
| Spec | Value | Source |
|---|---|---|
| Drain plug | 30 ft-lb · 6 mm hex | S1 Owner’s manual Unverified — confirm OM |
| Fill plug | 30 ft-lb · 14 mm | S1 Owner’s manual Unverified — confirm OM |
Brake torque & grease
Mounts listed at 151 ft-lb per William / Gen3 community DIY. Conflicting figures exist — read the source notes.
Torque
| Spec | Value | Source |
|---|---|---|
| Front caliper mount | 151 ft-lb · 19 mm | Gen3 community DIY (e.g. tundras.com 2022+ thread) — FSM-cited DIY posts, not a scanned FSM page. Magnet uses 151 per William. Conflicting refs exist (Repairius ~137; Gen2.5 / some FSM extracts ~133). Confirm FSM / VIN |
| Rear caliper mount | 151 ft-lb · 19 mm | Same Gen3 community DIY as front; William confirmed for magnet. Some threads cite much lower rear values for pin/guide bolts — do not confuse mount vs slide-pin. Confirm FSM / VIN |
| Slide / guide pins | ~25–55 ft-lb · 14 mm | Sources vary — confirm against FSM for your year. Magnet note: “confirm — sources vary.” |
Grease
| Spec | Value | Source |
|---|---|---|
| Pad backs | Silicone / ceramic, thin film | Standard brake-service practice (magnet) |
| Slide pins | High-temp silicone grease | Standard brake-service practice (magnet) |
| Clips / pad ears | Light film | Standard brake-service practice (magnet) |
| Never grease | Friction material or rotor face | Magnet safety note |
Fluids
Capacities and grades for gas 3.4L Gen3.
| Spec | Value | Source |
|---|---|---|
| Engine oil (w/ filter) | 7.7 qt · 0W-20 (ILSAC GF-6A) | S2 Lemon Manuals Unverified — confirm OM |
| Front differential | 1.36 qt · 75W-85 GL-5 (Toyota LT) | S3 toyota-club.net Unverified — confirm OM |
| Rear differential | 5.7 qt · 75W-85 GL-5 (Toyota LT) | S2 Lemon Manuals Unverified — confirm OM |
| Transfer case | 2.17 qt · ATF WS | S2 Lemon Manuals Unverified — confirm OM |
| Transmission (ref. capacity) | 11.7 qt · ATF WS | S2 Lemon Manuals Unverified — confirm OM |
| Engine coolant | 13.1 qt · Toyota SLLC | S2 Lemon Manuals Unverified — confirm OM |
| Brake fluid | DOT 3 | S7 MyAutoLog Unverified — confirm OM |
Parts / filters
OEM part numbers for Gen3 3.4L. Oil filter is the same spin-on for 2WD and 4WD.
| Spec | Value | Source |
|---|---|---|
| Oil filter (2WD & 4WD spin-on) | 90915-YZZN3 | OEM Gen3 spin-on (also 90915-10010). Same part for 2WD and 4WD — not a Gen2 cartridge. Confirm VIN. Unverified — confirm OM |
| Drain plug gasket | 90430-12031 | OEM crush washer; replace each oil change |
| Engine air filter | 17801-F4010 ×2 | S6 Frontier Toyota Unverified — confirm OM |
| Cabin air filter | 87139-0C010 ×1 | S7 MyAutoLog Unverified — confirm OM |
| Spark plugs | 90919-01295 ×6 | S8 Yota Garage (supersedes 90919-A1006 / DENSO 3523) Unverified — confirm OM |
Service intervals
Severe-use oil at 5k is what the magnet highlights (*). Confirm in the Warranty & Maintenance Guide for your model year.
| Spec | Value | Source |
|---|---|---|
| Oil & filter — severe | 5,000 mi / 6 mo | S7 MyAutoLog Unverified — confirm OM |
| Oil & filter — normal | 10,000 mi / 12 mo | S7 MyAutoLog Unverified — confirm OM |
| Tire rotation | 5,000 mi | S7 MyAutoLog Unverified — confirm OM |
| Cabin air filter | 15,000 mi / 12 mo | S7 MyAutoLog Unverified — confirm OM |
| Engine air filter | 30,000 mi | S7 MyAutoLog Unverified — confirm OM |
| Spark plugs | 40,000 mi | S8 Yota Garage Unverified — confirm OM |
| Coolant — first change | 100,000 mi / 120 mo | S7 MyAutoLog Unverified — confirm OM |
| Brake fluid | 36 months | S7 MyAutoLog Unverified — confirm OM |
Inspection notes
Gen3 driveline notes from the magnet checklist.
| Spec | Value | Source |
|---|---|---|
| U-joints | Sealed — no grease zerks; inspect driveline boots | Gen3 design / magnet inspection note |
| Prop-shaft bolts | Check / re-torque on schedule | Magnet inspection note — confirm OM torque |
| Brakes & tires | Pads, rotors, tread, pressure | Magnet inspection note |
| Fluids & lights | Levels, leaks, all lamps | Magnet inspection note |
Sources
IDs match the COW Auto Tundra Gen3 Service Specs Sheet (Specs + Sources tabs). Sheet Verified column is currently Unverified for these rows.
- S1 — Toyota owner’s manual (2025 Tundra; source of truth — to be checked). No public URL.
- S2 — Lemon Manuals — 2025 Tundra 3.4L Fluids
- S3 — toyota-club.net — Tundra 70 fluids & capacities
- S4 — EngineOilDB — 2025 Tundra oil
- S5 — WhatSizeBolt — 2025 Tundra lug torque
- S6 — Frontier Toyota — air filter 17801-F4010
- S7 — MyAutoLog — 3rd-gen Tundra maintenance schedule
- S8 — The Yota Garage — OEM spark plug 90919-01295
- S9 — TorqueSpec — Tundra lug nuts
- Brake mounts — Gen3 community DIY (e.g. tundras.com); magnet uses 151 ft-lb per William. Not a scanned FSM page.
Common services — how-to videos
Curated Gen3 (2022–2026) DIY links. We’ll turn these into a COW Auto YouTube playlist once the channel is ready — until then, this page is the playlist.
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Active front spoiler / air dam (service mode) Official Toyota
How to Service the 2022 Toyota Tundra Active Aero Front Spoiler -
Oil & filter change
2022–2023 Oil Change & Reset Maintenance Light — Good Shepherd Garage
2022–2026 Toyota Tundra Oil Change DIY | 3.4L Twin Turbo V6 — iTorqueDIY
How to Change Oil on a Toyota Tundra 2022-2025 & Reset Maintenance Light — Luke tbayo
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Front air dam (mechanic DIY)
How to lower Front Air Dam — Toyota Tundra 2022–2025 -
Tire rotation
Tire rotation with BASIC hand tools -
Cabin air filter
2022–2023 Toyota Tundra Cabin Air Filter — Oil Light Reset
2022–2024 Toyota Tundra Cabin Air Filter Replacement — Viktor G Automotive
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Engine air filters (×2)
2022+ Toyota Tundra Air Intake Filters Replacement — TheYotaGarage
2022–2024 Engine Air Filters Replacement — Viktor G Automotive
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Brake pads / rotors (incl. EPB)
HOW TO put EPB in Service Mode — Rear Brake Pads — Good Shepherd Garage
2022 3rd Gen Platinum Rear Brake Pad Change (EPB DIY) — Back Yard Engineering
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Spark plugs (V35A-FTS)
How To Change Spark Plugs on Toyota’s New Twin Turbo V6 V35A-FTS Engine
Not affiliated with Toyota. Videos are third-party DIY unless marked Official Toyota. Always follow torque and safety guidance for your exact VIN.
Amazon parts shopping list
Parts matching the Maintenance Magnet. As an Amazon Associate, COW Auto earns from qualifying purchases.
Shop parts on Amazon-
Oil filter — 90915-YZZN3 (2WD & 4WD spin-on)
Genuine Toyota 90915-YZZN3 (ASIN B0DYFXC4QK) · OEM 3-pack + washers (B0GHPGP2YP)
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Drain plug gasket 90430-12031
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Engine air filter 17801-F4010 ×2
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Cabin air filter 87139-0C010
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Spark plugs 90919-01295 ×6
Iridium 6-pack OEM-equiv (B0FK5ZCWJJ) · DENSO 3523 single — buy ×6 (B0B5YMHWX4)
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Engine oil — 0W-20 (~7.7 qt)
Mobil 1 AFE 0W-20 5 qt (B00J00X5YO) — aftermarket · Toyota Genuine 0W-20 6-qt case (B0FWFVS8JV) — OEM
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Brake fluid — DOT 3
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Brake grease
Permatex Ceramic Extreme (B0018PSASU) · Permatex Silicone Extreme (B01MTNJ08Z)
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Basic sockets — 14 / 19 / 22 mm
Upgrades
Optional performance parts for Gen3 Tundra — not required for the Maintenance Magnet schedule.
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K&N cold air intake — 63-9042
As an Amazon Associate, COW Auto earns from qualifying purchases. Prices and sellers change — confirm fitment by VIN before checkout. Not affiliated with Toyota Motor Corporation.